Grate bar



Allg. 30, 1932. R C, MORTQN K 1,874,579

GRATE BAR Filed May 29, 1930 2 Sheets-Sheet 1v TEC Aug. 30, 1932.

R. c. MQRTON GRATE BAR vFilm1 May 29, 195o 2 sheets-sheet 2 PatentedAug. 30, 1932` f UNITED,

I enATErmAs-R r.

:Appunti-burned.; may. 129, maar sria1QNo3f :457,125

Acstilliurthen :object-ofthe invention is to' .provide improved :meansjfo'r' :supporting the :grete'fbafr in such 'e :manner fasfftoproteot l@the :cradle the.r'intemseheetY of the fui nace.

Y A priinaryf eiitunei offzthez invention foonsistsrinmrovidiingqthelemdleftvith fa plurality of laterziflly'fprojeeting arms "adapted :to :underlie and :supportithesfuel,supporting ab er, the letter being provided with depending portionsVvenrsurged" 1inYr 'interloekingf'relation `ivitlizthe'ferme l. y K

f Another f featurernfthef :invention consists in :provi ding'. f ftlieirituel supporting member with' dep ending@plateelikepertionsi adjacentthey e'rms Y eof 1 'the oreille; the; ptetevlike portionsbeingprovidedwith llaterazlyextending lugs or 'projections'indented.tozbe v"disposed Within .grooves formed ain'fthe; arms- `I A 'furtherfeeturevo the #invention .consists in providingthe'eradile'with'aillurzrlity of laterally .proj eating` zi-rms s.Whichunderlie yand supp ort 'the .-'fue'l @supporting zbn, fone .kofthe ermsbein-g provirle'dwith aniapentu're forl receiving1 aportionldepefndingi "romtthe bar and 'another of seid farms 'beingprovided with *agroove'for "receivingV -ganother portion depending'fromtliebn 'I v f Other and moreI specific feifture's-ef-the invention"residing in advantageous forms combinations and relations -o'f partswill yhereinafter appear andbeipointetl out inr t-lre claims.v l e i fIn'Y the .drnwings illustratingfa preferred embodiment ofthe.invention:.v l

Fi'gll :is a, plan .view .offthefgrte( bar, por Uions of.: the .fuelsupporting bars -being V.broken eway, f r

Figure 2 is aside elevational. vien7 ,oitlre grate i iban portions of,the fuelfsupportin bars bein-gbrokeneway. Y Figure -3 isanenlarged:Jseetionalyiew .50 'teken on yline Ss-SfFigure 2.,

'..ligureV 4 is.l argmentarysectional view teken on Tline 4.-4h,lFi gure8. f p

` -5 'isfanA enlerged 'sectional 'view takeno/n line.. 5.-'455, Figurev2.

...Figure f6 isla. fragmentary jsectiona'l view 55 taken Yon line.-v-,Figure 5. A

.Ffgfure 7 is anend View fof the grate bar ,as..rvievved.romthe i leftioilFigere l.

.Figure lise-.detailed .View of. the. means employed vfor conneotingthe'fuel-supportu ber and. cradle.i

Referring .more particularly Ato .the drfiavv-` ings 1 'indicatesthezeradilennd .2 'the u'el supporting :brsf Adjoent..- its 'ends' .the`Cradleis. tormedfivithsooket portions '3 fand 65 4 adapted .to .receiveVpins Yor.` trunnions (not shown) Which-the cradle is supported in ythe.u'rnace. .`Tle .bottomi ponti-on 'of the socket-4= ispreterably ,openso. that it 'may be dowvered .or:.dro.ppedi1`pon itsr associated 70Jsupporting .trunnion .fand the. side- Walls of the'soclet.erepreerably'foirined v'itli aligned @apertures ormeceiyingn pin or'tlie like A.(not',showvn)i adapted .to extend beneath thetrunnion....The ,sookets sind 4 refintegne'lly l`v75 .connected :by a.bodyf portion 7 v'vliioh may ='ed- .vantageously .be the orm ofVsubstantially V vertical bar. n

l e jliterinedietefitsends.A the cradleis ,formed ..withn .fplgiirglity.ofpeirs .ot laterallypijol80 ectinggarms .8,59 end .10., respeetivelyljThe Aarms'.18.Vannli `are' 'respectively disposed ad- ,.jaee'ntlto ,but.nwrfdly of.. the sockets' '3 L.and

f4 xvliiilef theemnfish 10 1ere/.disposed 'adjacent the central `portionof bthe eradlesubs'tan-.M

'tiallys midway. .between :the :amis v8 'and 9.

isfaslrioned .with :n.grooveorrecess lIQ" .The rooves .formed yl'nsthe.arms of leach .pair

c iverge:dovnwardlyend the .side'fvvallsY 12 90 yand 13 of.. each groove.dinergeidownwardly with respect taeaohfother.

' Therentral-erms `10. are formed by .spaced Y plate-like .enwallportions 14;..conne`cted't fuel supporting bars 2 which preferablyeX- tend continuously from one end of the cradle to the other. Althoughthe bars have been shown with a plurality of longitudinally extendingair passages or openings it will be appreciated that these passages mabe of any desired size or configuration. t their ends the bars 2 aresuitably shapedor cut away to pass around the adjoining portions of thesockets 3 and `Il, the -upper surfaces of', which are disposed aboveythe armsyof the cradle in substantially the same plane asthe."

top surfaces of the grate bars. Each grate bar is integrally formed witha plurality vfdepending plate-like ymembers or ,portions 17 respectivelydisposed adjacent'the arms 8 and 9 ofthe cradle. Eachl of the platelikeportions vmay 'advantageously' bejof triangular shape "and each isformed withy an outwardly and laterally extending lug or projection 18adapted to be disposed within the n groove 'of the adjacent armi Theselugs inshape. he sidewalls 14 of the arms l10 and the plate portions 19are formed with registerin apertures to receive pins 2O for4 detacha lyconnecting the 'cradle'and grate bars. These pins before being insertedin the openings are of angle lshape as illustrated yin Figure 8.kk Afterbeing inserted inthe openings the projecting end of the pin' is i*bentupwardly and overlaps the adjoining wall of the arm 1() inthemanner shown in Figurey.. In order that the pinmay be readily removedwhen it is desired to renew lthe bar the downwardly projectingend ofythe' piny extends below the adjacent vportion "of the side wall of thearm so that it may he struckby ahammeror the like and bent upwardly intoa substantially horizontal posiltion.` -'The pin may then be driven`from the openings in the same direction .in which it was inserted."l vf' 1 Due to the fact that'the lugs 18 of one of the barsf2Y 'and thegrooves of the adjacent .arms respectively diverge downwardly withrespect to the lugs of the otherbar and the grooyes inits cooperatingarms it will be appreciated that to remove one of the bars from thecradle for the purpose of replacement it will have to be moved upwardlyin an inclined direction toward the 'remaining bar. never, sufficientclearance intervenes between the two bars s o that 'one will notinterfere 'with theV removal or replacementof the other.

It will be perceived that since the upper por-y 'tion of each lu n g jy. G'iswidersthan its lower por- `tion and since tlliegroove with whichit coop Howerates is also wider at the top than at the bottom the lugsmay be readily inserted in the grooves without carefullyaligning thearts and yet when the bar is assembled wit the cradle very littlerclearance intervenes between the upper portion of each groove and itsassociated lug. f l

As all portions of the cradle, to ether with the parts of the fuelsupportin ars which interlock therewith, are dispose beneath the mainbody portions lof the bars, the cradle, with; the exception of itssockets, is protected from the intense heat within the furnace.

,Thus the possibility vof warping of the cradle and the portions of thebars cooperating 'therewith is greatly reduced. F urtherrnorei since thefuel supporting bars rest upon an are supported intermediate their endsby the arms ofthe cradle they are prevented from warping downwardly toany appreciable extent. f f Y Although the cradle has been illustratedas being provided with three airs of arms a greater or less number ma eemployed depending upon the length o the fuel supporting bars supportedthereupon. Other modications 'and changes may be made in structuraldetails of the grate bars and cradle without departing from the spiritof the invention as defined bythe following claims.

lclaini: y

1. yA furnace grate involving a cradle having a plurality of armsprojecting laterally thereof intermediate its ends, and a fuel suporting bar extending longitudfinall of said vcradle and overlying andsupporte by said arms, said bar having a plurality of depending membersrespectivelydisposed adjacent said'arms, the' adjacent members and armshaving tongue and groove connection.y

2. A furnace ate involving a cradle having a body portion and Valurality of arms projecting-laterall from't e latter intermediate itsends, eac of said arms being provided with a groovefand a fuel suporting bar overlying and supported by sai arms, saidbar extendingVlongitudinally of the cradle and havin depending members respectivelydispose adjacent said arms, each of said members having a portiondisposed within the groove of the adjacent arm.

y3. A furnace grate involvlng a cradle having a plurality of armspro'ecting laterally thereo intermediate its ven s, each of said armsbeing provided with a groove, and a fuel supporting bar overlying andsupported by said arms, said bar having downwardly ex-'tendingplate-like portions respectively overlapping said arrns, each ofsaid plate-like portions being provided with alug disposed fwithin thegroove ofthe adjacent arm.

" 4.*A furnace grate involving a cradle having a plurality ofarms'projecting laterally thereof intermediate its ends, the adjacentsides of said arms being respectively provided vrH5 with grooves, and afuel supporting bar extending longitudinally of the cradle and overlyingand supported by said arms, said bar having a plurality of dependingplate-like portions respectively disposed adjacent said arms, each ofsaid portions being provided with an outwardly extending lug disposedWithin the groove of the adjacent arm.

5. A furnace grate involving a cradle having a body portion and aplurality of arms projecting laterally'of the latter intermediate itsends, and a fuel supporting bar overlying and supported by said arms,said bar extending substantially parallel with said body portion andhaving a plurality of depending plate-lile members respectively providedwith laterally extending lugs adjacent said arms, each of said armshaving portions embracing the lug of the associated platelike member ofthe bar.

6. A furnace grate involving a cradle having a plurality of armsprojecting laterally thereof intermediate its ends, and a fuelsupporting bar overlying and supported by said arms, said bar beingprovided with a plurality of depending members respectively adjacentsaid arms, one of said arms being provided with an aperture forreceiving one of said depending members and another of said arms beingprovided with a groove for receiving another of said dependingmembers,said apertured arm and the associated depending member being providedwith registering apertures to receive means for detachably connectingsaid bar and cradle.

7. A furnace grate involving a cradle having a plurality of laterallyprojecting arms, Vand a fuel supporting bar overlying and supported bysaid arms, one of said arms comprising spaced wall portions integrallyconnected adjacent their outer ends, said bar having a depending memberinterposed between the said spaced wall portions, said member and wallportions being provided with registering aperturesr for receiving meansfor detachably connecting the bar and cradle.

8. A furnace grate involving a cradle having a plurality of pairs oflaterally projecting arms, the arms of each pair being provided ivithdownwardly diverging grooves, and a plurality of fuel supporting barsrespectivelyoverlying and supported by one arm of each pair, said barshaving` depending members respectively disposed adjacent the arms of thecradle, each of said members having a portion disposed within the grooveof the adjacent arm.

9. A furnace grate involving a cradle having a plurality of pairs oflaterally projecting arms, and a plurality of fuel supporting barsrespectively overlying and supported by one arm of each pair, each ofsaid bars being 'i provided with a plurality of depending memy bersrespectively disposed adjacent the associated arms, the dependingmembers of one bar diverging downwardly with respect tothe'corresponding members ofthe other bar and each of said arms havingportions embracing the adjacent depending member.

- 10. A furnace grate involving a cradle having a body portion and aplurality of arms projecting laterally of the latter, and a fuelsupporting bar extending longitudinally of said body portion andoverlying and supported by said arms, said arms being disposedintermediate the ends of said bar and having portions disposed ininterlocking relation therewith.

11. A furnace grate involving a cradle having a plurality of pairs oflaterally projecting arms, the arms of each pair eXtendino' in oppositedirections, and a plurality of fuel supporting bars, each bar restingupon and being supported by one arm of each of said pairs, said armsbeing disposed intermediate the ends of the bars and having portionsdisposed in interlocking relation therewith.

In testimony whereof I ailix my signature.

ROBERT C. MORTON.

